Sight for firearms.



No. 644,584. lm'wn'md Mar. e, |900. G. DUBRENBERGEB.

SIGHT FOR FIREARHS.

(Appxiaeon med Aug. 17, 1899.)

(No Model.)

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UNITED STATES PATENT OFFICE.

GEORGE DURRENBERGEE, oE MIDDLEEIELD, CONNECTICUT, As'sIcNoE To LYMAN A.MILLS, oE sAME PLACE, EXECUTCE oE WILLIAM LYMAN, DE'- CEASED.

SPECIFICATION forming part of Letters Patent N o. 644,584, dated March6, 19O. Application tiled August 17, 1899. Serial No. 727,507. (Nomodel.)

T Coll whom it may concern:

Be it known that I, GEORGE DUERENEER- GER, a citizen of the UnitedStates, residing at Middlefield, in the county of Middlesex and State ofConnecticut, have invented certain new and useful Improvements in Sightsfor Firearms, of which the followingis a specification.

My invention relates to an improvement in sights for firearms, and hasfor its object to provide a wind-gage sight of simple, strong, andCompact construction, easily adj usted by a simple mechanical movement,and adapted to carry the sight rapidly to position and hold it securelyin place.

The invention consists in the novel construction, arrangement, andcombination of the base having the curved transverse guide bearing orway, the sight-carrier fitted therein and the adjusting mechanism andparts, as f hereinafter more fully described'and claimed.

In the accompanying drawings, forming a part of this speciiication,Figure 1 is a side elevation of my improved sight, and Fig. 2 is a planView of the same with the sight part depressed. Fig. 3 is an end View ofthe base viewed from the rear or right-hand side of Fig. 6. Fig. 4 is across-section on line ,r a: of Fig. 6. Fig. 5 is an end view of thesightcarrier removed from the base. Fig. 6 isa longitudinal verticalsection through the base. Fig. 7 is a plan view of the sight-carrier inthe depressed position of Figi. Fig. 8 is a perspective view of thesight, showing its mode of operation.

Referring to the drawings, A designates the base of the sight, which isadapted to be secured to the tang or stock of the rearm in the usualmanner by screws passing through the perforations a. Near the forwardend of the base is a raised part A2, formed with a transverse dovetailedgro^ove as in its rear face and having the groove a4 of rectangularcross-section at the front of the said dovetailed groove, as shown inFigs. l, 3, and 8. Said grooves comprise arcs of a circle struck fromthe center l0 below the base, which center may conform to any circlerequired of longer or shorter radius.

Journaled in the part A2 is a horizontal adjusting-screw D, located justabove and cutting into the highest or central part of the groove a4.Said screw is retained in place by a head d' on one end and a nut cl2 onthe other end screwed upon the reduced part d3 thereof. A foldingoperating head or handle E is attached to the head d for turning it; butthis feature is old and hence requires no further description.

F designates the sight-carrier, which is provided with a dovetailed partj", fitting the groove a3, and a part f2, projecting therefrom' andiitting the groove a4 in the base. Said parts are fitted to slide freelyin the way or grooves in the base, and a set-screw g is provided in thefront of the part A2 for tightening the carrier in its bearing bythrusting it rearwardly against the dovetailed sides vof the slot bypressure on the front side of the'part 2. The parts of the carrier itting the grooves of the base comprise arcs struck from the same radius asthe grooves in the base, and consequently fit perfectly therein.

The upper or exterior surface of the part f2 is formed with a rack orseries of teeth h, adapted to intermesh with the threads of the screw D,thus comprising worm-gear adjusting mechanism. In operation the rotationof the screw D, by means of the handle E,by impact of its threads uponthe rack h, causes the carrier to slide in its bearings to the right orleft of a central position for purposes of wind-gage. The upper surfaceof the part A2 is graduated, as shown in Fig. l, to designate the amountof wind-gage or position of the zero-mark 12 on the carrier relativelyto the said scale. The hub u on the base may also be graduated to markfractional revolutions of the adj usting-screw, as determined by azero-mark on the head of the screw.

To the` sight-carrier F is hinged the sightpart Il by means of a pivot,preferably formed with a loop 7c at one end, terminating in a tonguecomprising one side of the pivot, and adapted by spring tension to keepthe joint of the hinge tight and by its friction hold the sight part atany position; but such feature is old, here requiring no furtherdescription, it being understood that any suitable form of pivot-jointmay be employed, and also, if roo desired, the sight part may be rigidlymounted on the carrier and not adapted to fold, the invention relatingto the combination of the carrier and base and mode of operating themrelatively to each other. The si ght-post, here shown as of the typehaving a vertically-adj ustable stem m carrying the sight n, will alsobe understood as forming no part of this invention and here requiring nofurther description. Fig. 3, by means of dotted lines r, shows thepositions of the sight and axisof the sight-post as the carrier is movedin its guiding-way in the base. It will be seen that by means of theconstruction aforesaid the axis of the sight-post is always held 4radialto the center 10, and the sight n is carried in a path the length ofwhich is multiplied With reference to the travel of the ad'-justing-screw D proportionately to the distance of the sight n from thecenter l0 over that of the distance of the screw from the center,whereby a slight movement of the screw will carry the sight through agreat space, and the adjustment of the sight may be effected veryrapidly and easily. Fig. S shows the sight adjusted to its extremeposition at the right of the center.

It will be understood that the invention is not restricted to the formof sight shown, but may be applied to any class or design of sightsadapted for use as rear Wind-gage sights. In assembling the parts it isonly necessary to insert the carrier F in the guidinggroove in the baseand secure the adjustingscrew in place. The parts are strong and are notsubject to excessive wear or of becoming loose or out of order. The formof the groove or guiding-way in the base need not be confined to thedovetailed section, as any other shape of retaining capacity-that is,wider at the bottom than at the surface-will attain the result ofholding the carrier in place.

I claim as my invention and desire to secure by Letters Patent- 1. In asight for firearms the combination of a base, a sight-carrier guidedthereon to swing in an arc havingits axis below the base andlongitudinal of the barrel, and adjusting means for operating thecarrier in its guidingbearings to either side of the vertical centralplane of the barrel for wind-gage, substantially as and for the purposespecified.

2. In a wind-gage sight for firearms, the

combination of a base provided with a transverse curved groove orguiding-way, a sightcarrier tting and adapted to travel in said grooveor Way, and adjusting means for moving the carrier along the guiding-wayto adjust the sight for wind-gage, substantially as and for the purposespecified.

3. In a wind-gage sight for firearms, the combination of a base adaptedto be secured to the firearm and provided with a guidinggroove curved inthe arc of a circle transverse to the axis of the barrel and ofretaining form in cross-section, a sight-carrier fitting and received insaid guiding-groove and provided with a rack or series of vteeth and anadj usting-screw journaled in the base and intermeshing with the saidrack or teeth to operate the sight-carrier in its bearings substantiallyas and for the purpose specified.

4. ln a wind-gage sight for firearms, the combination of the baseadapted to be secured to the firearm and provided with a raised parthaving a transverse groove curved iu the arc of a circle and ofretaining form in cross-section; a carrier fitting said groove andprovided with a rack or section of a worm-gear, a sight mounted on saidcarrier, and an adjusting-screw journaled in said raised part of thebase and intermeshing with the wormgear teeth ot' the carrier foradjusting the sight for wind-gage, substantially as and for the purposespecified.

5. In a wind-gage sight for rearms, the combination of a base providedwith the raised part A2 having the transverse curved groove as -in itsrear face, and the groove a4 forward thereof, an adjusting-screwjournaled in the base over and impinging upon the highest .part of saidgroove co4, a sight-carrier provided With the curved projecting part f'fitting the groove as of the base, and a part f2 joined therewith andiitting the groove a4 of the base, and provided with a rack or teethupon its exterior surface intermeshed with vsaid adj listing-screw, a`sight mounted upon said carrier, and means for tightening the carrierin its guiding grooves or Ways, substantiallyin the manner and for thepurpose specified.

GEORGE DURRENBERGER. Witnesses:

ISADELL L. COOK, ALFRED H. AUGUR.

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